Hey guys
I am looking to make a wireless temperature sensing network, using 4 temperature sensors wirelessly transmitting their data to one point. I need to make the temperature sensors and transmitters as small and accurate up to high very temperatures, the receiver has no size limit but just needs to receive all 4 sensors and their data and store the data on a SD card or USB . I also need to take lots of data over about a 20 min period. I am looking for a parts list more than anything.
Thank you for Your Help!
Cory Milne
How high of a temperature?
k-type thermocouples go pretty high, lot of form factors available on e-bay, examples
Mate with AD595 chip from sparkfun or arrow.com, be same type of temperature reading setup as an oven controller
http://www.sparkfun.com/datasheets/Tools/Reflow-Toaster-v2-Schematic.pdf
Mate up with a Promini & RF transceiver like nrfl2401+, master query each slave for a reading & send via serial to a PC, or store on SD card.
will these temperature sensors work? i am trying to measure the temperature of the air inside of a tire in motion
or
LOL! What happened to very high temperatures?
If that's the range you need, I suppose they'd be fine.
I don't know the mechanics of mounting something inside of a tire.
haha thats pretty high for me I guess you proved me wrong
If you're talking about a rubber tyre then it's not going to get very hot relative to the range of commonly available temp senders - the tyre itself will fail at quite a low temperature. I can see a few issues you might need to deal with. Many tyres use steel belting behind the tread, so if you attach your sensor and transmitter to the inside of the tread you may find radio comms difficult. Car/truck tyres experience very high radial acceleration at high speeds, and you may find that the hardware is not mechanically robust enough. Each point on the tread experiences a violent jolt each time it comes down to the road surface which will increases the mechanical problems if you choose to mount your components there. Mounting them anywhere else may be hard, since the radial acceleration will tend to throw everything outwards.
Car makers manage to interface pressure sensors to the tires, I would think temperature sensor would be comparable; just no idea how that is done. My 2004 Jetta has no such technology.
it can be done F1 teams, and even commercial Jets have temperature and pressure sensors in the tire its self. The problem is getting the device small enough and fixing it to the rim
You can buy wireless temp/pressure sensors, maybe just use an existing product.
Rob
CrossRoads:
My 2004 Jetta has no such technology.
...yet 